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Author Topic: NEC 900 Firmware Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 05-08-2016 02:03 PM                     Marco, I get no complaints fomr any theater owners about it at all. And when I am on site the pictures are all looking great. I don't know what else to tell you... I certainly acknowledge the drives are way to coarse though. If there WERE problems with focus or image size drift I would certainly be hearing about it and seeing it for myself. I have 34 NC-900's installed. Mark  |  IP: Logged Marco Giustini Film God Posts: 2713 From: Reading, UK Registered: Nov 2007 posted 05-08-2016 02:19 PM                     then go tell NEC that they are mistaken and that the lens in the NC900 is working great because the pictures look good.  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 05-08-2016 04:26 PM                     Oh stop Mark...stop trying to defend the indefensible. It isn't even subject to interpretation. For the same reason that the shift adjustments are course is why it can't hit its mark. It's a fact. It does better (or is less noticeable) on zoom and focus but on H/V position, it is abysmal.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 05-09-2016 01:18 PM                     I agree and I mentioned above the motors were way too coarse. I just have not had any zoom or focus drift issues at all. Mark  |  IP: Logged Marco Giustini Film God Posts: 2713 From: Reading, UK Registered: Nov 2007 posted 05-09-2016 05:01 PM                     So you had "zero lens problems with the 900" and "zero complaints and no focus or zoom drift" and also "the pictures are all looking great" - but the 'pictures' are a foot off the screen as the H/V shift is just rubbish. Sounds like a great technical analysis to me.  |  IP: Logged Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 05-09-2016 06:05 PM                     I have an NC900 in a distant location which I only visit once a year. They may not do the most advanced lens movement possible there, it's a constant height screen. But I never have to adjust the lens when I'm there. So, it may be coarse, it may be off a bit from time to time, but it seems there is no absolute drift. I'm okay with that. It's a low cost machine, what do you expect? From the customers point of view, it's performing flaw-less. - Carsten  |  IP: Logged Ian Freer Expert Film Handler Posts: 135 From: Wellington, New Zealand Registered: Oct 2003 posted 05-09-2016 07:27 PM                     I generally agree with Carsten. The lens shift for me does not hit the same spot twice, but it does not drift more and more over time either. It's never 'perfect', but in general the image is just fine and not causing anyone any grief. Whether that's acceptable because it's 'low cost', I am not sure. It's low cost compared to a bigger machine, but still a significant investment, especially for a smaller theatre... Personally I find it frustrating. I have changed my approach to screen files when installing these projectors; rather than try and be pixel-perfect, I now leave a little over-spill on to the masking (that's almost, sorta, kinda (yeah I'm trying to justify this to myself) what it was there for in the first place with 35mm) so hopefully between each lens format change, the over-spill may shift a little to the top and next time a little to the bottom or whatever, but generally end up with the image always filling the screen.  |  IP: Logged Marco Giustini Film God Posts: 2713 From: Reading, UK Registered: Nov 2007 posted 05-10-2016 03:29 AM                     I confirm the lens does not drift, it simply doesn't hit the same spot twice. It's still a 5-zero worth machine, I reckon it should be possible to engineer a better solution for lens positioning. Most of our customers won't complain unless the picture is upside down AND with wrong colours. If a customer does not complain about something, that doesn't mean anything to me. If we evaluated equipment based on customer satisfaction, everything would be top notch.  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 05-10-2016 05:19 AM                     Yes, it does not drift so much as the lens shift system does not have the "resolution" to land on the same place twice. Low cost or no, it was ill designed. You can get home theatre projectors that cost 1/10 that have better accuracy. My brief experience with Barco's S2K machines was better in terms of lens accuracy too. Now, if you have constant width screens, THEN you could effectively never move the lens so the problem wouldn't show itself (shift the image, if necessary on the imager).  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 05-10-2016 09:54 AM                     My case is the latter one where we are only using the zoom. I agree there are more accurate home projectors and why NEC used such coarse Hall drive motors is beyond me. Mark  |  IP: Logged

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